S: (n) Puccinia, genus Puccinia (type genus of the Pucciniaceae; a large genus of parasitic fungi including many that are destructive to various economic plants)

S: (n) Gymnosporangium, genus Gymnosporangium (genus of fungi that produce galls on cedars and other conifers of genera Juniperus and Libocedrus and causes rust spots on apples and pears and other plants of family Rosaceae)

S: (n) type genus ((biology) genus from which the name of a family or subfamily is formed; it is not necessarily the most representative genus but often the largest or best known or earliest described)

S: (n) form genus ((biology) an artificial taxonomic category for organisms of which the true relationships are obscure)